380v Transformer Install

Go ahead. You mentioned South Africa so I figured we had shifted gears to countries of the world.
It was your reference to Europe I commented on. There are others similar - I picked one.
No big deal. Stick with the 380Vac....
 
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Thank you for the help. Never occurred to me that it’s the maximum and we could have gone lower. Since I already stock the material I was just going to wire everything with #6 THHN anyhow but atleast that does cut down on cost of an additional disconnect and 3 fuses.

Yes, a bunch of the transformer values are maximums, not requirements.

You can have up to 250% primary protection in many cases, but there is no requirement that you go up to this value. I've even used less than 100% primary protection in a case of 'those were the components I had in stock to get the job working'.

You can have up to 125% secondary protection in many cases, but if you don't need the full transformer capacity you can use less.

In your installation, since you are meeting the 125% secondary protection rules, I'd recommend using the largest primary OCPD consistent with tap rules and conductor sizes, to minimize the risk of nuisance tripping on inrush current. Especially if this transformer is likely to be energized/de-energized frequently.
 
Yeah. That stuff can be pretty tough. I can understand why you'd be confused.
Not confused -I have been around quite a fair bit and worked with different systems. Including 380V 60 Hz which where we were up to.
 
I’m confused, about every one of your posts.
Just come out and say what you mean.
Nothing I have said applies to this problem. I'm just having a little fun with Besoeker. Anything not 400/230 volts and 50 Hz really fries his brain so I just got ahead of him here.
 
Nothing I have said applies to this problem. I'm just having a little fun with Besoeker. Anything not 400/230 volts and 50 Hz really fries his brain so I just got ahead of him here.
Ha ha ha.................
 
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